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upstream

[uhp-streem] /ˈʌpˈstrim/
adverb
1.
toward or in the higher part of a stream; against the current.
adjective
2.
directed upstream; situated upstream:
an upstream journey; an upstream hideout.
3.
Commerce. of or relating to the early stages in the operations of a business or industry, as exploration and production in the oil business (opposed to downstream).
4.
against or opposite to the direction of transcription, translation, or synthesis of a DNA, RNA, or protein molecule.
Origin of upstream
1675-1685
1675-85; up- + stream
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for upstream

upstream

/ˈʌpˈstriːm/
adverb, adjective
1.
in or towards the higher part of a stream; against the current
2.
(in the oil industry) of or for any of the stages prior to oil production, such as exploration or research Compare downstream (sense 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for upstream
adj.

1680s, from up- + stream. In common use from c.1890.

Online Etymology Dictionary, © 2010 Douglas Harper
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upstream in Technology

networking
Fewer network hops away from a backbone or hub. For example, a small ISP that connects to the Internet through a larger ISP that has their own connection to the backbone is downstream from the larger ISP, and the larger ISP is upstream from the smaller ISP.
(1999-08-05)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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